Occasionally waves of fear find expression in a rash of false perceptions and symptoms of physical illness. Girls in an English school fainted in great numbers; women in Mattoon, Ill., reported being anesthetized and assaulted by a mysterious prowler. The best documented case is that of a clothing factory that had to be closed down and fumigated because of reports of toxic insect bites—reports that could not subsequently be substantiated. The U.S. sociologist Alan C. Kerckhoff and the U.S. psychologist Kurt W. Back found that the crisis came after a period during which the women employees had performed ... (100 of 10,272 words)